7. Flurophotometry The night before (10 PM) the fluorophotometric scans, participants will self-administered 3 to 6 drops of fluorescein sodium 2% (Minims, Bausch&Lomb, UK) topically into both eyes at 5 minutes interval depending on their age (age 25 years or younger, 5-6 drops; age 26 to 35 years, four drops; over 35 years of age, three drops). Fluorophotometry will be performed in both eyes using a scanning ocular fluorophotometer from 9AM to 12PM (FM-2, Fluorotron Master Ocular Fluorophotometer; OcuMetrics, Mountain View, California). The aqueous turnover protocol will be used to calculate the aqueous flow rate. Duplicate or triplicate scans will be collected and repeated at 1 hour intervals for 4 measurements to determine the aqueous flow rate (Ft). Following each set of scans, IOP will be measured using pneumatonometry (Model 30 Classic, Reichert Ophthalmic Instruments, Depew, New York). IOP will be recorded as the arithmetic mean of a total of 12 measurements per eye: 3 measurements every hour alternating between eyes.